package com.atguigu.common.valid;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.HashSet;
import java.util.Set;
/**
 * 自定义校验器
 */
public class ListValueConstraintValidator implements ConstraintValidator<ListValue, Integer> {
    private Set<Integer> set = new HashSet<>();

    //初始化方法
    @Override
    public void initialize(ListValue constraintAnnotation) {
        int[] vals = constraintAnnotation.vals();
        for (int val : vals) {
            set.add(val);
        }}

    //判断是否校验成功，value：需要校验的值
    @Override
    public boolean isValid(Integer value, ConstraintValidatorContext context) {
        return set.contains(value);    //判断set里面是否包含 value，包含就true，相反
    }}

